Directions

Heat the oil in a nonstick medium skillet. Add the onions, season with 1/4 teaspoon kosher salt and cook over low heat, stirring frequently, until caramelized, 25 minutes; set aside.

Preheat the oven to 350 degrees F.

In a large mixing bowl, beat the cream cheese with a hand-held electric mixer until smooth; beat in the mayonnaise until smooth. Add the reserved caramelized onions, the artichoke hearts, mozzarella, Parmesan, hot sauce, Worcestershire and half of the green onions. Add an additional 1/4 teaspoon of salt and some black pepper to taste and stir together until combined. Transfer the dip to a pie plate or shallow gratin dish and bake until the top is golden brown, 30 to 40 minutes.